From f0610728edb9e30c54fec57f7538bfc568603250 Mon Sep 17 00:00:00 2001
From: minhi0449 <minhi0449@gmail.com>
Date: Wed, 2 Apr 2025 01:19:37 +0900
Subject: [PATCH] =?UTF-8?q?feat:=20=EC=83=81=ED=92=88=20=EC=97=94=ED=8B=B0?=
 =?UTF-8?q?=ED=8B=B0=20=EA=B4=80=EB=A6=AC=EC=9A=A9=20ItemRepository=20?=
 =?UTF-8?q?=EC=9D=B8=ED=84=B0=ED=8E=98=EC=9D=B4=EC=8A=A4=20=EC=B6=94?=
 =?UTF-8?q?=EA=B0=80?=
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---
 src/main/java/com/SpringMall/entity/Item.java   |  2 +-
 .../SpringMall/repository/ItemRepository.java   | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/com/SpringMall/repository/ItemRepository.java

diff --git a/src/main/java/com/SpringMall/entity/Item.java b/src/main/java/com/SpringMall/entity/Item.java
index 4718430..1b84c99 100644
--- a/src/main/java/com/SpringMall/entity/Item.java
+++ b/src/main/java/com/SpringMall/entity/Item.java
@@ -17,7 +17,7 @@ public class Item {
 
     @Id
     @Column(name = "item_id")
-    @GeneratedValue(strategy = GenerationType.AUTO)
+    @GeneratedValue(strategy = GenerationType.AUTO) // JPA 구현체가 자동으로 생성 전략 결정 (JPA가 사용자 대신 적절한 방식을 선택)
     private Long id; // 상품 코드
 
     @Column(nullable = false, length = 50) // not null 설정 , 길이 = 50
diff --git a/src/main/java/com/SpringMall/repository/ItemRepository.java b/src/main/java/com/SpringMall/repository/ItemRepository.java
new file mode 100644
index 0000000..8d8986a
--- /dev/null
+++ b/src/main/java/com/SpringMall/repository/ItemRepository.java
@@ -0,0 +1,17 @@
+package com.SpringMall.repository;
+
+import com.SpringMall.entity.Item;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ItemRepository extends JpaRepository<Item, Long> {
+    /* JpaRepository<T,ID> : 2개의 제네릭 타입을 사용하는데
+                             첫 번째에는 엔티티 타입 클래스
+                             두 번째에는 기본키 타입을 넣어줌
+
+      [ JpaRepository 에서 지원하는 메소드 ]
+      1. <S extends T> save(S entity) : 엔티티 저장 및 수정
+      2. void delete(T entity) : 엔티티 삭제
+      3. count() : 엔티티 총 개수 반환
+      4. Iterable<T> findAll() : 모든 엔티티 조회
+    */
+}